CN100570665C - The smooth transient method of coordination signal time distributing conception in the urban traffic control system - Google Patents
The smooth transient method of coordination signal time distributing conception in the urban traffic control system Download PDFInfo
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Abstract
The invention discloses the smooth transient method of coordination signal time distributing conception in a kind of urban traffic control system that adopts computer program.Chaotic light color, the signal time distributing conception of showing of signal lamp suddenlyd change when the timing scheme that the solution prior art exists changed, and two coordinate scheme too short or long control effects that cause transit time descend the defective that the crossing blocks up.The steps include: 1) installation and measuring device, teleseme, signal lamp and server, and successively they are coupled together with optical cable, wireless and electric wire; 2) teleseme is differentiated the main line coordinated control mode; 3) teleseme reads the timing scheme that main line is coordinated adjacent two periods of control; 4) teleseme carries out the transient period scheme optimization; 5) determine each phase place green time of crossing.Described main line coordinated control mode includes: 1) no cable trunk coordinated control mode; 2) the cable trunk coordinated control mode is arranged; 3) master-slave mode main line coordinated control mode; 4) main line system coordinated control mode.
Description
Technical field
The present invention relates to a kind of method that is used for the urban traffic management and control system signal timing dial, relate to the smooth transient method of signal time distributing conception in a kind of urban traffic control system specifically.
Background technology
Because traffic flow there are differences in one day, therefore in main line control, adopt multi-period fixed or actual time line prosecutor formula more.That is to say, according to the actual detected data day part is adopted different timing schemes by traffic engineer.Its gordian technique is how to determine each timing parameter, i.e. phase place phase sequence, cycle duration, each phase place split and each crossing phase differential, thus realize the optimum control of traffic flow.When cycle of system coordination and phase differential change, just need seamlessly transitting of scheme, seamlessly transitting of scheme promptly is meant the transfer process of system from a controlling schemes to another controlling schemes, do not consider the actual traffic conditions of demand in the process of its conversion.After the scheme of seamlessly transitting executed, coordinated crossing group just can carry out the coordination controlling schemes of new optimization.Coordinate in the control at main signal, for prevent signal time distributing conception suddenly, change apace, be difficult for too short the transit time of two coordinate schemes.Because the short stability that has upset traffic flow transit time, thereby reduction system control effect; On the other hand, owing to cross the scheme of moving non-Optimal Control effect longways, also make the control effect of whole coherent system reduce.Therefore suitable transition signal timing scheme is coordinated the control effect to main line and is played an important role.
Traditional coordination control smooth transient method is seldom considered the requirement of coordinated control mode to smooth transient method, thereby cause in a control system, smooth transient method is single, be not suitable for the variation of actual traffic situation and control mode, and then cause actual traffic control effect undesirable, even the traffic congestion phenomenon takes place.Traditional coordination control smooth transient method, do not consider the transport need of scheme transition period, tend to occur transient period overlong time or too short phenomenon, thereby the utilization factor that causes green time is lower or the traffic congestion phenomenon appears in local time, and this has just had a strong impact on the crossing operational efficiency.In control system, the time that seamlessly transits of coordinating control timing scheme is too short, easily causes hair tonic during this period to give birth to traffic hazard, has a strong impact on the control system operational effect.In traditional control system, need 5min-10min the switching time of coordinating the phase place scheme, and this is concerning adaptive control system, and the execution time of each scheme is generally at 5min-15min, obviously, this discontented demand of signal controlling when full of time that seamlessly transits.Along with the aggravation of urban traffic congestion, the frequent transition of signal time distributing conception and applying of traffic signals precedence technique, the transition algorithm of further investigation timing scheme, for the orderly function that promotes traffic flow, it is very necessary improving running efficiency of system.
Summary of the invention
Technical matters to be solved by this invention is to overcome the unexpected variation of the signal time distributing conception that exists in the prior art and the deficiency that upsets traffic flow stability, adopt computer program, the smooth transient method of coordination signal time distributing conception in a kind of urban traffic control system is provided.
For solving the problems of the technologies described above, the technical solution used in the present invention is installation and measuring device, teleseme, server, signal lamp, and successively they is coupled together with optical cable, wireless and electric wire, also comprises employing the following step:
1) teleseme is differentiated the main line coordinated control mode.
2) teleseme reads the timing scheme that main line is coordinated adjacent two periods of control.
3) teleseme carries out the transient period scheme optimization.
Main line coordinated control mode described in the technical scheme includes: 1) no cable trunk coordinated control mode, 2) cable trunk coordinated control mode, 3 are arranged) master-slave mode main line coordinated control mode, 4) the main line system coordinated control mode; Described teleseme reads main line, and to coordinate the timing scheme of adjacent two periods of control be whether the scheme of differentiating adjacent two periods belongs to the internal control scheme under the main line system coordinated control mode; Whether belong to the internal control scheme under the master-slave mode main line coordinated control mode; Whether belong to perhaps that the master-slave mode main line is coordinated control, had that the cable main line coordinates that control, no cable main line are coordinated to control, in the controlling schemes between the main line system coordinated control mode one; Described teleseme carries out the transient period scheme optimization and also comprises the following steps: 1) differentiate whether meet first kind of method that seamlessly transits, 2) if, computation period drift value c ', 3) differentiate and whether satisfy 0≤c '＜0.5c
NewlyCondition, 4) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3, 5) if do not satisfy 0≤c '＜0.5c
NewlyCondition, differentiate and whether to satisfy 0.5c
Newly≤ c '＜1.5c
NewlyCondition, 6) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3, 7) if do not satisfy 0.5c
Newly≤ c '＜1.5c
NewlyCondition, determine to satisfy 1.5c
Newly≤ c '＜2c
NewlySeamlessly transit cycle duration c under the condition
Cross 1, c
Cross 2And c
Cross 3, 8) if do not meet first kind of method that seamlessly transits, carry out second kind of method that seamlessly transits, read the zero hour of intending implementing coordinated control mode, 9) computation period adjustment factor t value, and 10) differentiate and whether satisfy 0≤t＜c
Newly/ 2 condition, 11) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3, 12) if do not satisfy 0≤t＜c
Newly/ 2 condition determines to satisfy t 〉=c
NewlySeamlessly transit cycle duration c under/2 conditions
Cross 1, c
Cross 2And c
Cross 3
Beneficial effect of the present invention:
In the urban traffic control system smooth transient method of coordination signal time distributing conception according to multiple coordinated control mode in the control system, designed the smooth transient method under the various situations with suiting measures to local conditions, the practicality and the feasibility of method have been guaranteed, thereby solved when scheme changes in the actual control system the chaotic practical problems that shows light color of signal lamp.
2. the smooth transient method of coordination signal time distributing conception has provided under different traffic coordinating control modes in the urban traffic control system, the smooth transient method of timing scheme.This method has avoided seamlessly transitting in the domestic and international in the past control system deficiency of the various traffics of algorithm incompatibility, has improved the versatility of control system, lays the foundation for realizing optimum control effect.
3. the smooth transient method of coordination signal time distributing conception has provided the smooth transient method of two kinds of timing schemes in the urban traffic control system.This method makes teleseme automatically perform the smooth transient method of optimum coordinate scheme according to different control modes, not only avoids because the variation suddenly of signal time distributing conception the defective that the transit time of two coordinate schemes is too short; Avoided again on the other hand because long run transition scheme makes whole coherent system control the drawback that effect reduces.Therefore the smooth transient method of the coordination timing scheme of the present invention's proposition plays an important role to main line coordination control effect in the urban control system.
4. the smooth transient method of coordination signal time distributing conception is all carried out new coordinate scheme in the intact back of three cycle transition in the urban traffic control system, and in traditional control system, the transition and conversion time of coordinate scheme needs 5-10min, this is concerning adaptive control system, the execution time of each scheme is not satisfy the modern control system demand of control in real time generally at 5-15min.
5. the smooth transient method of coordination signal time distributing conception not only makes and carries out optimum coordinate scheme quickly in the urban traffic control system, and algorithm fully takes into account the actual traffic demand of scheme transition period in design process, thereby avoided the transport need on the discontented full border of transition scheme of control system in the past to cause vehicle delay time transitional period to increase, even caused the generation of crossing jam.
6. the smooth transient method of coordination signal time distributing conception is not only applicable to the general control crossing of coordinating in the urban traffic control system, also be applicable to the binary cycle crossing, has avoided binary cycle crossing in the control system can't realize situation about seamlessly transitting.
7. the smooth transient method of coordination signal time distributing conception can be avoided the sudden change of controlling schemes and cause the incompatible phenomenon of environment newly of driver in the urban traffic control system, has improved the crossing security.
8. the smooth transient method of coordination signal time distributing conception has taken into full account the demand of crossing in the urban traffic control system, can avoid the appearance of the too short or long phenomenon of cycle regimen, improves the operational efficiency of crossing.
Description of drawings
Fig. 1 is the transition synoptic diagram of first kind of smooth transient method technical scheme of smooth transient method of coordination signal time distributing conception in the urban traffic control system;
Fig. 2 (a) be coordination signal time distributing conception in the urban traffic control system second kind of smooth transient method technical scheme of smooth transient method passed through 3 transition synoptic diagram that new cycle duration transition finishes;
Fig. 2 (b) be coordination signal time distributing conception in the urban traffic control system second kind of smooth transient method technical scheme of smooth transient method passed through 4 transition synoptic diagram that new cycle duration transition finishes;
Fig. 3 is the smooth transient method technical scheme schematic process flow diagram of coordination signal time distributing conception in the urban traffic control system.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing:
I. design concept of the present invention and major technique feature
The present invention relates to the smooth transient method of coordination signal time distributing conception in a kind of urban traffic control system that adopts self-editing computer program.Self-editing computer program is packed in the teleseme, and teleseme moves the smooth transient method that this self-editing computer program is achieved coordination signal time distributing conception in the urban traffic control system.
The smooth transient method of coordination signal time distributing conception is by analyzing the difference of multiple main line coordinated control mode in the urban control system, having determined different smooth transient methods in the urban traffic control system that the present invention proposes.When carrying out next coordination controlling schemes, in order comparatively fast to realize the optimum angle difference scheme of non-key crossing with respect to crucial crossing, guarantee again simultaneously that controlling schemes changes stationarity, signal transition scheme before and after needing to set up between two schemes, and taken into full account of the influence of the undulatory property of timing scheme to traffic flow.Proposed to comprise the novel smooth transient method of the smooth transient method of binary cycle crossing.This method had both satisfied the requirement of smooth transition between scheme, had avoided transition controlling schemes in the past not satisfy the drawback of transport need again, had brought into play vital role for the coordinating control of traffic signals scheme reaches optimal effectiveness.
Prepare a computer program and relate to the smooth transient method of four kinds of coordinated control modes and two kinds of timing schemes.The four kinds of coordinated control modes that now prepare a computer program involved and the smooth transient method of two kinds of timing schemes are described below:
Four kinds of coordinated control modes are no cable trunk coordinated control modes, cable trunk coordinated control mode, master-slave mode main line coordinated control mode and main line system coordinated control mode are arranged.
No cable trunk coordinated control mode is a kind of of fixed line coordination control, does not have communication link between the teleseme, according to clock synchronization, by setting the control mode that phase differential realizes that each crossing traffic signals is coordinated.
It is a kind of fixed line coordination control mode that the cable trunk coordinated control mode is arranged, and the phase is sent synchronization pulse by communication link weekly, according to the time difference that is set in advance in each teleseme, determines the cycle start-up time, realizes temporal coordination.
Master-slave mode main line coordinated control mode is that (the point coordination teleseme is except that possessing the multi-period control of single-point, single spot optimization control, single-point induction control function by the point coordination teleseme, can also receive and handle detector data, and upload data to region server, and can also download for other telesemes in the control area and coordinate controlling schemes, thereby realize coordinating in the zone control.) control mode that other telesemes are coordinated to control.
The main line system coordinated control mode is a control mode of coordinating each crossing by the Region control server.
The present invention is directed to different dry line coordination control mode, set up the smooth transient method of two kinds of timing schemes:
The smooth transient method of first kind of timing scheme is applicable to following several situation:
(1) seamlessly transitting between the inner solution under the main line system coordinated control mode;
(2) seamlessly transit between the inner solution under the master-slave mode main line coordinated control mode;
(3) master-slave mode main line coordinated control mode, seamlessly transitting between cable main line coordinated control mode, no cable main line coordinated control mode, main line system coordinated control mode arranged.
Generally speaking, main line system coordinated control mode, master-slave mode main line coordinated control mode are schemes of renewal in per 15 minutes, traffic behavior changes generally little in short time, therefore the variation of the timing parameter (cycle duration, phase differential) of adjacent two controlling schemes is less, can reach smooth transition by carrying out 3 transition schemes.For the crucial crossing (in the crossing of participating in line traffic control, that crossing of cycle maximum is called " crucial crossing ") in the main line coordination crossing, after executing old scheme, carry out new controlling schemes immediately.For other crossings, 3 transition schemes of middle execution are replaced by new timing scheme then.Transition scheme is determined according to new departure of Region control downloaded by teleseme, consults Fig. 1, the cycle duration calculation procedure of transition scheme and be compared as follows (cycle duration need round) with new cycle duration size:
1. calculate the cycle duration drift value c ' of transition scheme
Coordinate control timing scheme (the new cycle duration c of period according to the next one of Region control downloaded
Newly, phase differential o
Newly) with controlling schemes (the cycle duration c of current execution
Old, phase differential o
Old) value, according to c '=c
Newly+ o
Newly-o
OldDetermine cycle duration drift value c ', if c '＜0 that calculates, c '=c '+c in addition then
Newly, otherwise, c '=c '.
2. calculate the cycle duration c in 3 cycles of transition scheme
Cross 1, c
Cross 2And c
Cross 3
According to cycle shift value size, determined the transitional cycle duration scheme of scheme
(1) as 0≤c '＜0.5c
NewlyThe time, c
Cross 1=c
Cross 2=c
Newly+ int (c '/3), c
Cross 3=c
Newly+ c '-2int (c '/3)
This moment c
Newly≤ c
Cross＜1.16c
Newly
(2) work as 0.5c
Newly≤ c '＜1.5c
NewlyThe time, c
Cross 1=c
Cross 2=int[(2c
Newly+ c ')/3],
c
Cross 3=2c
Newly+ c '-2int[(2c
Newly+ c ')/3]
This moment 0.5c
Newly≤ c '＜c
NewlyThe time, 0.83c
Newly≤ c
Cross＜c
Newlyc
Newly≤ c '＜1.5c
NewlyThe time, c
Newly≤ c
Cross＜1.18c
Newly
(3) work as 1.5c
Newly≤ c '＜2c
NewlyThe time, c
Cross 1=c
Cross 2=int[(c
Newly+ c ')/3 c],
Cross 3=c
Newly+ c '-2int[(c
Newly+ c ')/3]
This moment 0.83c
Newly≤ c
Cross＜c
Newly
In the formula: c
Cross 1---non-key crossing is transition scheme cycle duration (s) for the first time
c
Cross 2---non-key crossing is transition scheme cycle duration (s) for the second time
c
Cross 3---non-key crossing is transition scheme cycle duration (s) for the third time
c
Newly---move down the crossing cycle duration (s) of period
o
Old, o
Newly---upper and lower 15 minutes phase differential (s)
The smooth transient method of second kind of timing scheme is applicable to following several situation:
(1) the single-point controlling schemes is upgraded to seamlessly transitting of coordination controlling schemes (main line system being coordinated control, the master-slave mode main line is coordinated control, had cable main line coordination control, no cable main line to coordinate control);
(2) there are cable (or not having cable) main line controlling schemes and another that seamlessly transitting between cable (or not having cable) main line controlling schemes arranged.
Consult Fig. 2, the cycle duration calculation procedure of transition scheme is as follows:
1. it is poor the zero hour to calculate a last scheme finish time and next controlling schemes, and the length that promptly a certain last cycle of control mode takies more, note are done the transient period and adjusted the factor, represent with t.
2. calculate the cycle duration c in 3 cycles of transition scheme
Cross 1, c
Cross 2And c
Cross 3
(1) as 0≤t＜c
Newly/ 2 o'clock, c
Cross 1=c
Cross 2=int[(3c
Newly-t)/3], c
Cross 3=3c
Newly-t-2int[(3c
Newly-t)/3]
At this moment, 0.83c
Newly＜c
Cross≤ c
Newly
(2) as t 〉=c
Newly/ 2 o'clock, c
Cross 1=c
Cross 2=int[(4c
Newly-t)/3], c
Cross 3=4c
Newly-t-2int[(4c
Newly-t)/3]
At this moment, c
Cross≤ 1.16c
Newly
In the formula: c
Cross 1,2---the crossing transition scheme is cycle duration, cycle duration (s) for the second time for the first time
c
Cross 3---the crossing transition scheme is cycle duration (s) for the third time
c
Newly---the cycle duration (s) of main line prosecutor formula new departure
The time span (s) that t---need that last cycle of a certain control mode takies more calculate
Fig. 2 is the transition synoptic diagram of second kind of smooth transient method technical scheme, wherein in (a) figure, has passed through 3 new cycle duration transition and has finished, and in (b) figure, has passed through 4 new cycle duration transition and has finished.
T among Fig. 2
1Be new departure for the control of cable main line is arranged, when no cable main line is controlled, (the initial moment embodies the phase differential between the crossing to the setting of the zero hour in teleseme of main line controlling schemes, as: crucial crossing is 8:00:00, a certain non-key crossing is 8:00:25, and this non-key crossing is 25s with respect to the phase differential of crucial crossing); When new departure is main line system control, the control of master-slave mode main line, then the main line controlling schemes be the zero hour the first string download constantly and phase differential sum (crucial crossing phase differential is 0).
Can handle by two kinds of above-mentioned situations for the cycle transition problem in the coordination control that has the binary cycle crossing.The cycle duration that uses in the formula is public cycle duration, is not the cycle duration of binary cycle crossing, and the transient period duration that calculates is reallocated to the binary cycle crossing.Below with the example explanation that makes an explanation.
Coordinate subarea cycle duration 80s, a certain non-key crossing is with respect to the old phase differential o of crucial crossing
OldBe 78s, promptly lag behind 78s or in advance 2s give a green light; The public cycle duration c of new departure
NewlyBe 90s (cycle of binary cycle crossing is 45s), new phase differential o
NewlyBe 1s, the 1s that promptly lags behind gives a green light.Calculating can get: c '=13s, because 0≤c '＜0.5c
NewlySo, c
Cross 1,2=c
Newly+ int (c '/3)=90+int (13/3)=94, c
Cross 3=c
Newly+ c '-2int (c '/3)=90+13-2 * 4=95.But the transient period duration for the binary cycle crossing is respectively: 47,47,47,47,47,48s, after this cycle duration of binary cycle crossing is 45s, and 6 transient periods will be carried out in the binary cycle crossing, and 3 transient periods then will be carried out in non-binary cycle crossing.
II. implement the smooth transient method of coordination signal time distributing conception in the urban traffic control system
Consult Fig. 3, clearly on the basis, we are further described the enforcement of implementing the smooth transient method of coordination signal time distributing conception in the urban traffic control system in the smooth transient method introduction of four kinds of coordinated control modes that prepare a computer program involved and two kinds of timing schemes.The smooth transient method of coordination signal time distributing conception is made up of hardware and program software two parts in the urban traffic control system, promptly is made up of hardware components and computer software two parts of detecting device, teleseme, server, signal lamp and transmission equipment.The smooth transient method of coordination signal time distributing conception is on the basis of existing hardware equipment in the urban traffic control system, in teleseme, pack self-editing computer program into and realize the smooth transient method of coordination signal time distributing conception in the urban traffic control system, complete says that it comprises the steps: to install hardware device, teleseme is differentiated the main line coordinated control mode, teleseme reads the timing scheme that main line is coordinated adjacent two periods of control, teleseme carries out transient period scheme optimization and definite crossing phase place green time and makes it in the operation of concrete crossing, makes wagon flow orderly, safely by the main line crossing.Now be described in detail as follows in chronological order:
1. installation and measuring device, teleseme, signal lamp and server, and successively they are coupled together with optical cable, wireless and electric wire, for the realization of the smooth transient method of coordination signal time distributing conception in the urban traffic control system provides hardware device support (the present invention used hardware device ready-made).
2. teleseme is differentiated the main line coordinated control mode
The present invention has designed four kinds of coordinated control modes according to the functional requirement of actual control system: no cable trunk coordinated control mode, cable trunk coordinated control mode, master-slave mode main line coordinated control mode and main line system coordinated control mode are arranged.These four kinds of control modes be determine in advance in system or by central server control mode is downloaded to teleseme.Therefore when differentiating the main line coordinated control mode, only need to read just passable from teleseme.
3. teleseme reads the timing scheme that main line is coordinated adjacent two periods of control
Teleseme reads main line, and to coordinate the timing scheme of adjacent two periods of control be exactly whether the scheme of differentiating adjacent two periods belongs to internal control scheme under the main line system coordinated control mode; Whether belong to the internal control scheme under the master-slave mode main line coordinated control mode; Perhaps whether belonging to the master-slave mode main line coordinates the control control mode, in the controlling schemes between cable main line coordinated control mode, no cable main line coordinated control mode, main line system coordinated control mode is arranged, be, just carry out first kind of smooth transient method program, otherwise carry out second kind of smooth transient method program.
4. teleseme carries out the transient period scheme optimization
Described teleseme carries out the transient period scheme optimization and also comprises the following steps:
1) differentiates his condition whether meet first kind of smooth transient method;
2) if, computation period drift value c ';
Download controlling schemes to adjacent two periods of this teleseme according to higher level's teleseme or central control server, program is according to model c '=c
Newly+ o
Newly-o
OldDetermine cycle duration drift value c ', if c '＜0 that calculates, c '=c '+c in addition then
Newly, otherwise, c '=c ', wherein the span of control system regulation crossing phase differential o [0, c) between, promptly 0≤o＜c this shows, cycle shift plant c ' [0,2c) between.
3) differentiate whether satisfy 0≤c '＜0.5c
NewlyCondition;
4) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3
According to model c
Cross 1=c
Cross 2=c
Newly+ int (c '/3), c
Cross 3=c
Newly+ c '-2int (c '/3)., determine to seamlessly transit cycle c
Cross 1, c
Cross 2And c
Cross 3
5) if do not satisfy 0≤c '＜0.5c
NewlyCondition, differentiate and whether to satisfy 0.5c
Newly≤ c '＜1.5c
NewlyCondition;
6) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3
According to model c
Cross 1=c
Cross 2=int[(2c
Newly+ c ')/3 c],
Cross 3=2c
Newly+ c '-2int[(2c
Newly+ c ')/3] determine to seamlessly transit cycle c
Cross 1, c
Cross 2And c
Cross 3
7) if do not satisfy 0.5c
Newly≤ c '＜1.5c
NewlyCondition, determine to satisfy 1.5c
Newly≤ c '＜2c
NewlySeamlessly transit cycle duration c under the condition
Cross 1, c
Cross 2And c
Cross 3
According to model c
Cross 1=c
Cross 2=int[(c
Newly+ c ')/3 c],
Cross 3=c
Newly+ c '-2int[(c
Newly+ c ')/3] determine to seamlessly transit cycle c
Cross 1, c
Cross 2And c
Cross 3
8) if do not meet the condition of first kind of smooth transient method, carry out second kind of smooth transient method, read the zero hour of intending implementing coordinated control mode;
9) computation period is adjusted factor t value;
According to a last scheme finish time and next the controlling schemes difference zero hour determining cycle adjustment factor t value;
10) differentiate whether satisfy 0≤t＜c
Newly/ 2 condition;
11) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3
According to model c
Cross 1=c
Cross 2=int[(3c
Newly-t)/3], c
Cross 3=3c
Newly-t-2int[(3c
Newly-t)/3] determine to seamlessly transit cycle c
Cross 1, c
Cross 2And c
Cross 3
12) if do not satisfy 0≤t＜c
Newly/ 2 condition determines to satisfy t 〉=c
NewlySeamlessly transit cycle duration c under/2 conditions
Cross 1, c
Cross 2And c
Cross 3
According to model, c
Cross 1=c
Cross 2=int[(4c
Newly-t)/3], c
Cross 3=4c
Newly-t-2int[(4c
Newly-t)/3] determine to seamlessly transit cycle c
Cross 1, c
Cross 2And c
Cross 3
5. determine each phase place green time of crossing
At first according to y
i=q
i/ S
iRelation is determined each phase place throughput ratio, wherein q
iBe the flow value of phase place i, S
iThe saturation volume rate of phase place i (being saturation volume) and Y=∑ y
iDetermine that the crossing total flow compares Y.Then, in teleseme, read crossing phase loss time l
i, crossing total losses time L and phase place green light I interval time
i, according to g
i=y
i(c-L)/Y and G
i=g
i+ l
i-I
iRelation determines that the effective green time of phase place i and green light show the time (s), and wherein c is the cycle duration of crossing.
So far, coordinate the transition scheme (cycle duration of crossing and phase place green time) of control and just decide, and this controlling schemes is shown greenish-yellow red operation of indicating wagon flow by signal lamp.
Claims (3)
1. the smooth transient method of coordination signal time distributing conception in the urban traffic control system that adopts computer program, this method includes the following step: installation and measuring device, teleseme, server, signal lamp, and successively they are coupled together with optical cable, wireless and electric wire, it is characterized in that the smooth transient method of coordination signal time distributing conception in the described urban traffic control system also adopts the following step:
1) teleseme is differentiated the main line coordinated control mode;
2) teleseme reads the timing scheme that main line is coordinated adjacent two periods of control;
3) teleseme carries out the transient period scheme optimization, comprises the following steps:
(1) differentiates whether meet first kind of method that seamlessly transits;
(2) if, computation period drift value c ';
(3) differentiate whether satisfy 0≤c '＜0.5c
NewlyCondition, wherein: c
Newly. new cycle duration;
(4) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3, wherein: c
Cross 1. transition period 1 duration, c
Cross 2. transition duration second round, c
Cross 3. transition period 3 duration;
(5) if do not satisfy 0≤c '＜0.5c
NewlyCondition, differentiate and whether to satisfy 0.5c
Newly≤ c '＜1.5c
NewlyCondition;
(6) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3
(7) if do not satisfy 0.5c
Newly≤ c '＜1.5c
NewlyCondition, determine to satisfy 1.5c
Newly≤ c '＜2c
NewlySeamlessly transit cycle duration c under the condition
Cross 1, c
Cross 2And c
Cross 3
(8) if do not meet first kind of method that seamlessly transits, carry out second kind of method that seamlessly transits, read the zero hour of intending implementing coordinated control mode;
(9) computation period is adjusted factor t value;
(10) differentiate whether satisfy 0≤t＜c
Newly/ 2 condition;
(11) if determine to seamlessly transit cycle duration c
Cross 1, c
Cross 2And c
Cross 3
(12) if do not satisfy 0≤t＜c
Newly/ 2 condition determines to satisfy t 〉=c
NewlySeamlessly transit cycle duration c under/2 conditions
Cross 1, c
Cross 2And c
Cross 3
2. according to the smooth transient method of coordination signal time distributing conception in the described urban traffic control system of claim 1, it is characterized in that described main line coordinated control mode includes:
1) no cable main line coordinated control mode;
2) cable main line coordinated control mode is arranged;
3) master-slave mode main line coordinated control mode;
4) main line system coordinated control mode.
3. according to the smooth transient method of coordination signal time distributing conception in the described urban traffic control system of claim 2, it is characterized in that reading main line by described teleseme, to coordinate the timing scheme of adjacent two periods of control be whether the scheme of differentiating adjacent two periods belongs to the internal control scheme under the main line system coordinated control mode; Whether belong to the internal control scheme under the master-slave mode main line coordinated control mode; Whether belong to perhaps that the master-slave mode main line is coordinated control, had that the cable main line coordinates that control, no cable main line are coordinated to control, in the controlling schemes between the main line system coordinated control mode one.
Priority Applications (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104091451A (en) * | 2014-07-08 | 2014-10-08 | 公安部交通管理科学研究所 | Transitional adjustment method for arterial traffic signal coordination control |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101226692B (en) * | 2007-12-21 | 2011-08-31 | 青岛海信网络科技股份有限公司 | Coordination type influence traffic control method |
| CN102005125B (en) * | 2010-12-10 | 2013-09-18 | 东南大学 | Discharging method of vehicles passing intersection and related design method and control system |
| CN102509461B (en) * | 2011-11-03 | 2014-03-19 | 安徽科力信息产业有限责任公司 | Traffic signal coordinated control smooth transition and deviation correction method |
| CN102881173B (en) * | 2012-09-24 | 2015-01-21 | 青岛海信网络科技股份有限公司 | Traffic demand control method and system |
| CN102915645B (en) * | 2012-09-29 | 2014-12-24 | 大连理工大学 | Transition method for active phase-oriented arterial road coordinate signal control scheme |
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| CN104318791A (en) * | 2014-10-20 | 2015-01-28 | 安徽师范大学 | Multiple-intersection traffic flow self-adaptive coordination control method |
| CN104332062B (en) * | 2014-10-28 | 2016-08-24 | 北方工业大学 | Intersection signal based on sensing control model is coordinated to control optimization method |
| CN104916144B (en) * | 2015-05-17 | 2017-05-24 | 浙江大学 | Traffic signal coordination control scheme smooth transition method considering periodic constraints |
| CN106935040A (en) * | 2017-04-05 | 2017-07-07 | 河海大学 | The method of discrimination that a kind of intersection traffic lights are set |
| CN108932844B (en) * | 2018-10-17 | 2021-07-30 | 石家庄学院 | Traffic light control method and device |
| CN109903570B (en) * | 2019-04-22 | 2020-10-13 | 吉林大学 | Intersection signal timing scheme smooth transition method under multi-period timing control |
| CN110189531B (en) * | 2019-05-22 | 2021-07-02 | 东南大学 | Method for making coordination control transition scheme of urban road trunk line intersection |
| CN111028519B (en) * | 2019-12-28 | 2021-01-12 | 江苏航天大为科技股份有限公司 | Self-adaptive control method based on video flow detector |
| CN111524375B (en) * | 2020-04-29 | 2021-05-11 | 青岛海信网络科技股份有限公司 | Control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104091451A (en) * | 2014-07-08 | 2014-10-08 | 公安部交通管理科学研究所 | Transitional adjustment method for arterial traffic signal coordination control |
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